Drilling machine for tapping out the hot metal of furnaces and cupolas



Oct. 7 1924. R 15,928

Y J E. JUDY DRILLING IACHINB FOR TAPPINGQUT .THE HOT METAL 0F FURNACES AND CUPOLAS Originai Filed April 8, 1921.

oet 7,1924. r ED STATES UNI.

l ntention relates to drilling machines I- for tapping out the hot metal of furnaces and cupolas to permit the hot metal to run into the pots or ladle's.

.Theimjiantion contemplates the provision of a machine adapged to be operated bapfluid pressure and to suspended from 1' b oraneor other movable supporting ele- IIQD swung into position m front of theitapp held there during the dfilling ofehola' A furtherobject of ';the invention is-the hole as fastas itis bored or drilled. m I o 'ects and advantages of the invention yill set forth in the detailed dewhich follows.

the accompanying drawing:

is a View part1 I in side elevan and partly in longitu inal section of a, constructed in accordance i f w -the inaentiom and p e 2 rise transverse sectional view '8 upon 2 -2 of Figure 1 illustrating an I notary shaft and a tubular piston ere'inafter described. I a I QBeferr-ihfi to the drawin 5 designates a cylinder, e ends of whi are closed by 6 7. A stufling box 8 in the head 6 means for maintaining a fluid @jointabout a shaft 9 which at that t is round in cross section. A. stuffing i 110 carried by the head 7 provides means for maintaining a ti ht joint about a tubu- 1 pistplrodll, w ich hasboth reciprom1 rotatiye movement in said staff- A'piston 12 is mounted in the cylf ertt gndas provided with piston ring snpply pg 14 delivers H wedtair or at er pressure to ai founway valve 15, said valve,

lipii gnzgne ition, admitting the pressure geld from e pipe 14 to one end of the v nmnie ncimm non WAITING our Tanner m.

l euronas.

- once had therein to the accompanying v provision .oqfkmeam to hlow the dust out of J'dBEPH E. JUDY, OF IOKEESP OBT, PENNSYLVANIA.

emin t: 1, 1922, Serial no. am, filed p111 a,.-1es1. Amman m- I reissue filed July 21, 1923. Serial Ho. 652,895. a

cylinder through a pipe 16 and port 16" and establish' communication between the other end of e cylinder and an exhaust pipe 17 through pipe 18,- and when in an.- other position, admitti the pressure v fluid; to the last named of the cylinder thro h pipe 18 and connecting the other end 0. the cylinder with the exhaust as will be readilyunderstood.

The piston 12 is mounted upon a spool 19, said spool being'capable of rotation with respect to the piston. This spool comprises a shoulder 20, a threaded extension: 21 and a threadedend 22. Bearing plates 23 and 24 constitute ball races WhlOh receive ballbearings 25 between them. A corresponding antifriction bearing is disposed upon or rumincas'nim v pipe 17 i the opposite side of the piston and com rises pressure fluid within the cylinder from wing from one side of the, piston to the an x p a w f The extension 21 of the spool is connected by a sleeve or coupling 32 with the hollow piston rodl land this hollow piston rod is provided exteriorly. of the cylinder with a coupling or block 33 in which a drill 34 is held by a set, screw or like fastening device 35. The' drill-is inted at 36 and in addition is provided with a. flaring countersinking cutter37 which traverses the drill and is held therein by a set screw 38. An air or pipe 39 terminatesrearwardly of thecutter 37 and receives its supplyof pressure fluid from the hollow piston rod through a" bore 39. The hollow piston rod in turn receives this pressure fluid from a port 40- which is formed longitudinall through the spool andtherear end of whic is in communication with port 16.

The shaft 410i 2. motor 42 is connected by a-flcou ling sleeve 43, with the end of the shaft 9 rough the medium of keys 44 and pin 45. Thus'the shaft 9 is caused tov rotate 'with the shaft ilof the motor. sleeve43 lies u n one side of a plate 45' that is supported upon thebe plate 46 ands. collar 47 secured to the Shaft air ,is' theii ailml t force the-drill that is to be removed from the tapping Hack to. "the starting point.

pour'out' into the pots ,or ladies.

x 'fto'rota'te wit electric mota 'upont e base outside of the side of this late, the whole constituting a thrust of the "9. Thus it will be understood that the shaft 9 rotates but does not reciprocate. The hollow piston rod 11 rotates and reciprocates, while thepfiitonflfl-reoiprocates but does not rotate.

As before stated, that portion of the shaft 9= which asses through the stuflin box 8 is mndis gth tportion said 'aft'upon which the spool reciprocates is angular in cross section, a isillustrated in Figure 2,

13d to' holll it in properly centered relation" iespeet to the hollow piston rod, it is with a plurality of spacin blocks '59 which bear iipon the inner periphery oftastenow pistes rod.

i on dumping band 51 surrounds the cy an "5 and provides means for supporting the' untire' structure froma jib crane. In operation the device is swun around in front of theta 'ng hole an compressed .d to the rear end of the cylinder in "the manner desctlibed. This fortes the piston 12 forwardly in the cylintiter and, brings the point of the drill into contaet'with the plug hole that is to be opened; The motor 42 is then started and Motion is imparted to the'drill through shaftitlgspool' 19, vhollow piston rod 11, and 516 533: Pressureis maintainedin the rear of pistofi durih f' the drilling operation gihwm rdly fliid 'some of v presslnfe'fiuid findsitsway through pigs 39in?! blbws thefdust away as fast as t e hole is drilled. Time the hole is drilled flid'ke clean .in one operation: The 'instaht t tthe -drill goes through the King ole,

flidT'iihtfr wayvalve is turnedto the other and pressure is admitted in front or the piston to force the drilla'nd iston done the drilling machine, by means of. the

crane back clear of the. pouring trough aiid'the 'hct, metal is permitted to Having1 "described invention whatl "an desire to secure Iietters Pat device the character described as a bodily portabl e'uriitfia base, wp resstfre cylinder mounted u on said .base,

a iston in said cylinder, a piston rod mount- Y ectto the iston, an

cylinder and serving-to im position while said unit is being Q0 "pmegent endw'ise movement en t 'is is.

I to the spindle, and-means interm' swungto and from the tapping hole of a furnace.

2. A device of the character described comprising as a bodily portable unit, means throughlwhich said unit may be hung for swinging movement to and from the tappin hole of a furnace, of ahorinoirtally dispose frame, a horizontally disposed pressure cylinder on the'frame, an electric motor coaxial with said cylinder, a shaftconnected to'said motor and rotated by said motor, a spool slidablymountedupou an an ular portion of the shaft, a piston mounted to rotate with respect to said 29001, a hollow piston rod connected to sai 'spool a'nd a drill carried by saidhollow piston rod.

v 3. A device of the character described comprising a supporting base, a motor mounted thereon, a pressurecylindermounted thereon, a shaft projecting into the'pre'ssure cylinder and having an angular tion therein, means for connecting said s aft to the shaft ofthe motor, a thrustiiarirrg resisting endwise movement of said shaft,

a spool Within the cylinder slidabl mountfriction bearings upon the periphery of the v spool, a piston carried by the" '01 and disposed between said arrtiffiction ear' guiding elements carried by the In: 7 portions of the shift and bearing against the inner 1periphery of the 156110 5. star:

rod, a dri a 'couplingb'etwoen 'sai drill and the hollow 'ston rod, an air blastipipe and means esta fishing communication-fibetween the air blast pipe-and the interim-o! the hollow piston rod.

4'. In a furnace tapping machine, a motor having adriving shaft carried by a base and held against movement relative thereto, a drill spindle reciprocally carried by motor shaft, means for connectin valdrill ef iiatp the motor and the drill for advancing retracting the drill. 5. In :a furnace 'ta ping machine, a rotary and reciprocatory rill carrying memes, rotating means for saidmem'ber, a cylinder, a non-rotatable piston within'said cylinder, slidably and rotatably carried by'saidrotatirrg means for reciprocating said memher, and means for directing"m actuating medium to opposite sides of said piston. 6. In a "furnace tapping machine, a totary and'recipfr'oeatory dflll c'an-yin'g member, a' sliaft or rotating said'memberfia cylinder, a non-rotatable piston 'wi'thin said cylinder slidably and rotatablycarried i said shaft for reciprocating sill! 'tnefliber,

means for directing an actuating medium toopposite sides of said piston,"and ims'ans -adjacent the opposite end of said cylinder from the drill-carrying member for rotatsaid shaft.

In a furnace tapping machine a bodily portable unit, a pressure cylinder, a nonrotatable piston therein, a drill carrying 'member projecting from one end of the ma projecting forwardly beyond the opposite end of the base, the piston rod being operatively connected to said motor for rotatlon thereby, a piston on said piston rod, and means for admittin pressure to the opposite sides of said piston for the purpose of advancing and retracting drill.

9. In a furnace tapping machine, a pressure cylinder, a piston therein, a piston rod connected to the piston and mounted to rotate with respect to the piston, a shaft telesoopicalli connected to the piston rod and arrange to rotate the piston rod, means to rotate said shaft, a drill carried by the piston rod, and means for admitting fluid pressure to the cylinder to actuate the piston and piston rod to advance and retract the drill.

10. In a furnace ta ping machine, a rtable base, a motor a jacent one end t ereof, a shaft connected to said motor and rotated thereby, a pressure cylinder into which said shaft projects, a spool slidably mounted upon the shaft within the piston and rotatable therewith, a piston rotatably carried b said spool, a piston rod connected to sai spool, and a drill carried b said piston rod and projecting beyond t e opposite end of the base.

11. In a furnace tapping machine, a bodily portable unit, a supporting frame, a pressure cylinder thereon, a piston in said cylinder, a drill carrying member adapted to be forced forwardly by said piston, means remote from said drill carryin member for imparting rotation thereto, an a suspension means w ereby said unit may be suspended with the drill in operative tapping-position.

In testimony whereof I hereunto afiix my signature.

JOSEPH E. JUDY. 

